CN1160821A - Wave cam type compressor - Google Patents
Wave cam type compressor Download PDFInfo
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- CN1160821A CN1160821A CN 96107382 CN96107382A CN1160821A CN 1160821 A CN1160821 A CN 1160821A CN 96107382 CN96107382 CN 96107382 CN 96107382 A CN96107382 A CN 96107382A CN 1160821 A CN1160821 A CN 1160821A
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Abstract
The wavy-cam compressor has two cylinder blocks, each of them has rotating driving shaft supported in center and several cylinders configurated around the shaft. The wavy cam installed on the driving shaft has two, front and back, cam surfaces. On the cam surfaces, the width for the piston to move to the lower dead point in the second position is narrower than that to the upper one in the first position.
Description
The present invention relates to a kind of by making piston reciprocating and fluid that will infeed in the cylinder carries out compressor for compressing in cylinder barrel.In more detail, be a kind of by be fixed on the live axle and with the rotation of the waveform cam of its one rotation, and the Wave cam type compressor that piston is moved reciprocatingly.
But had the swash plate that has live axle, be fixed on the rotation of one on this live axle in the past, be arranged on this swash plate and be assembled in the oblique tray type compressor of the piston in the cylinder barrel.This compressor is by being rotated by swash plate by live axle, and makes piston to-and-fro motion in cylinder barrel, thereby the fluid that will infeed in the cylinder barrel compresses.In this compressor, the periodic displacement of swash plate sine wave characteristics curve representation.In this compressor, live axle whenever revolves and turns around, and is just once compressed by the piston convection cell.
On the other hand, for above-mentioned oblique tray type compressor, be that target has been developed the wave mode cam type compressor with miniaturization and increase capacity.But this compressor has live axle, be fixed on the waveform cam of one rotation on this live axle and be connected, be arranged at piston in the cylinder barrel with this cam.This compressor drives piston to-and-fro motion in cylinder barrel by made the rotation of waveform cam by live axle, thereby the fluid that will infeed in the cylinder barrel compresses.In this compressor, live axle whenever revolves and turns around, and just by piston fluid is compressed twice, and its effect is by the displacement properties that camming surface had of waveform cam, can make compressor miniaturization and increase capacity.
The spy opens the example that clear 57-110783 communique discloses this Wave cam type compressor.This compressor has and is arranged at two sides and two ends before and after the waveform cam and has roller between the double-head piston of head.The piston rotation relatively of this roller, and can not out of gear mesh mode coupling together.The relative waveform cam rotation of this roller, along with the rotation of waveform cam, the periodicity displacement of its camming surface has passed to piston.By the transmission of this displacement, just to-and-fro motion of piston corresponding to the displacement properties of camming surface.
As shown in Figure 9, waveform cam 80 has camming surface 81, and this camming surface 81 has concave curved surface 81a and convex surface 81b and intersects continuous stero shape mutually.Here, along with the rotation of waveform cam 80, the specified point among the concave curved surface 81a arrives the position relative with the piston (not shown), and makes pistons reciprocating arrive its lower dead centre, the specified point of convex surface 81b makes its upper dead center of piston arrives when arriving the position relative with piston.
In Fig. 9, the camming surface 81 of waveform cam 80 moves reciprocatingly piston by the roller (not shown).For this reason, the camming surface 81 of this cam 80 must carry out high-precision grinding and grinding.For camming surface 81 is carried out grinding, and waveform cam 80 is rotated towards a direction, by axle 83 will with emery wheel 84 rotations of camming surface 81 parallel configuration, through after this grinding, can improve the dimensional accuracy and the surface roughness of camming surface 81.
Yet,, thereby when camming surface 81 grindings, can cause following problem because above-mentioned camming surface 81 has concave curved surface 81a and the continuous stero shape of convex surface 81b intersection.
Figure 10,11 shows the camming surface 81 by emery wheel 84 grindings.As shown in figure 10, the camming surface 81 of convex surface 81b during and the area of contact α of emery wheel 84 by emery wheel 84 grindings, as shown in figure 11, the camming surface 81 with the concave curved surface 81a of camming surface 81 during by emery wheel 84 grindings is different with the area of contact β of emery wheel 84.Therefore, when (perhaps concave curved surface 81a) was mobile from concave curved surface 81a (or convex surface 81b) to convex surface 81b, its grinding condition changed at emery wheel 84.Thus, particularly in the jointing place of concave curved surface 81a and convex surface 81b, the machining accuracy of camming surface 81 reduces.Surface roughness on the whole circumference of camming surface 81 and size just can not keep homogeneous.Consequently, between waveform cam 80 and piston, roller just is difficult to motion, thereby has reduced the compression efficiency of compressor.
Therefore, in order to address the above problem, as shown in Figure 2, in compressor, adopted the waveform cam 91 that has and only convex surface 92a is formed the camming surface 92 of cylinder.In this cam 91, roughly the same with the area of contact of emery wheel on whole camming surface 92.
Yet, under the situation of above-mentioned waveform cam 91, also can be former thereby reduce the grinding capacity of emery wheel owing to the obstruction of wheel face etc.In this case, continue to use this emery wheel and guarantee the cutting power that it is certain, just must allow emery wheel that camming surface 92 is applied big pressure.Under the big situation of this pressure that is applied, the counter-force that is applied on the emery wheel will become big.Like this, for this camming surface 92 is carried out grinding, under the situation of using emery wheel 84 shown in Figure 9, above-mentioned pressure will make axle 83 bendings greatly, and emery wheel 84 just can not contact well with camming surface 92, thereby reduces the machining accuracy of 84 pairs of camming surfaces 92 of emery wheel.
Have, in present manufacturing process, a plurality of waveform cams 91 carry out grinding successively by an emery wheel again, like this, can use an emery wheel for a long time, thereby can improve the manufacturing efficient of waveform cam 91.This just means need prolong the life-span of the camming surface 92 of waveform cam 91 with above-mentioned characteristic being carried out Grinding toolss such as the employed emery wheel of grinding effectively.
Therefore, main purpose of the present invention provides the waveform cam compressor in the life-span of the employed Grinding tools of grinding that a kind of camming surface that can improve the waveform cam carries out.
The variation of another object of the present invention provides a kind of camming surface that can be suppressed at the waveform cam when carrying out grinding with Grinding tools grinding resistance, thus grinding goes out the Wave cam type compressor of the camming surface of high manufacturing accuracy.
In order to finish above-mentioned purpose, its live axle of Wave cam type compressor of the present invention is provided with the waveform cam, will be made on the drive axis direction right cylinder barrel on the circumference that with above-mentioned axis is the center, dispose a plurality of, be installed in above-mentioned each to the double-head piston that has a pair of head in the cylinder barrel with along above-mentioned axial direction movably mode be provided with.Be provided with in the bi-side of above-mentioned waveform cam and have identical shaped pair of cams face, be respectively arranged with on above-mentioned each camming surface that with above-mentioned each double-head piston one is positioned at the 1st position that the upper dead center position of cylinder barrel uses and with the 2nd position that is positioned at the lower dead point position of cylinder barrel of above-mentioned each double-head piston, can move a pair of piston shoes of setting with respect to above-mentioned each camming surface, be connected on above-mentioned each double-head piston.And, this compressor by with the rotation of the above-mentioned waveform cam of above-mentioned live axle all-in-one-piece, through above-mentioned each piston shoes are made one of above-mentioned each double-head piston to-and-fro motion between the upper dead center of above-mentioned cylinder barrel and lower dead centre.Simultaneously, by allowing one of above-mentioned double-head piston moving to above-mentioned lower dead centre from above-mentioned upper dead center, and fluid is sucked in the above-mentioned cylinder barrel, and by above-mentioned double-head piston one moves to above-mentioned upper dead center from above-mentioned lower dead centre, fluid will compress in the above-mentioned cylinder barrel and will suck.In this Wave cam type compressor, on the imaginary plane vertical with the central axis of above-mentioned waveform cam with above-mentioned each camming surface during along above-mentioned central axis projection on the formed projection plane, the width of each camming surface at above-mentioned the 2nd position is set for the width of above-mentioned each camming surface that is narrower than above-mentioned the 1st position.
Fig. 1 is the whole sectional view of Wave cam type compressor among the embodiment;
Fig. 2 is along the sectional view of 2-2 line among Fig. 1;
Fig. 3 is the stereogram that has the waveform cam of cylinder shape camming surface;
Fig. 4 is the three-dimensional sketch of expression parabolic cylinder;
Fig. 5 is the simple ideograph of the deflection curve of expression camming surface displacement properties;
The side view of emery wheel and swing platform when Fig. 6 is waveform cam ground;
Fig. 7 is the side view that will swing the state in platform when rotation from the state of Fig. 6;
Fig. 8 is the stereogram of waveform cam under the expression grinding state;
The planimetric map of the state when Fig. 9 is expression to the waveform cam of the camming surface that has concave curved surface and convex surface with wheel grinding;
Figure 10 is the phantom of the state of the waveform cam convex surface of Fig. 9 when carrying out grinding by emery wheel;
Figure 11 is the phantom of the state of the waveform cam concave curved surface of Fig. 9 when carrying out grinding by emery wheel;
Figure 12 is the stereogram that expression has cylinder shape camming surface waveform cam in the past.
A specific embodiment of Wave cam type compressor of the present invention is described with reference to the accompanying drawings.
As shown in Figure 1, a pair of cylinder block fixed with each other 13,14 is supporting live axle 11 pivotally by radial bearing 12.It is a pair of before and after a plurality of cylinder barrel 13a, the 14a that forms respectively on two cylinder block 13,14 makes.Each to cylinder barrel 13a, 14a with round the center of live axle 11 uniformly-spaced angle configurations in cylinder block 13,14.Each can to-and-fro motion in this cylinder barrel 13a, 14a to being separately installed with double-head piston 16 in the cylinder block 13,14.Double-head piston 16 refers to the piston that two ends have head.Front cover 19 that two cylinder block 13,14 rear and front ends dispose respectively and rear end cover 20 with respect to each cylinder body 13,14 through each valve plate 17,18 and fixing by bolt 21.Each suction chamber 24 that is provided with in each end cap 19,20, each suction port 22 of being offered by each valve plate 17,18 is communicated with cylinder barrel 13a, 14a respectively.The chamber 25 of respectively discharging that is provided with on each end cap 19,20 is communicated with each cylinder barrel 13a, 14a respectively by each exhaust port 23 of being offered by each valve plate 17,18.
Shown in Fig. 2,3, front and back two camming surface 30a, the 30b of waveform cam 30 has the circumferential surface C0 of the configuration corresponding to the axis L 1 of each cylinder barrel 13a, 14a.This circumferential surface C0 has on the direction of axis L1 the characteristic of twice reciprocal deflection back and forth.This displacement properties is represented by deflection curve F1, F2 as the circular path on camming surface 30a, the 30b in Fig. 1-3, the center of this circumferential surface C0 is consistent with the axis L 0 of live axle 11, and the central axis of waveform cam 30 is also consistent with the axis L0 of live axle 11.Here, center Q1, the Q2 of each sphere 33a, 34a overlaps with the center of plane 33b, 34b, and for this reason, center Q1, the Q2 of each sphere 33a, 34a is slidingly connected along deflection curve F1, F2 and camming surface 30a, 30b all the time.Therefore, along with the rotation of waveform cam 30, during to-and-fro motion, by its to-and-fro motion, the displacement of each piston 16 is consistent with the displacement of deflection curve F1, F2 in cylinder barrel 13a, 14a for each piston 16.
As shown in Figure 3, two camming surface 30a, the 30b of waveform cam 30 are made of predetermined imaginary damaged surface (hereinafter referred to as cylinder).Each camming surface 30a, 30b have that with the piston among cylinder barrel 13a, the 14a 16 one is in two the 1st position 30a1,30b1 of upper dead center position (at this moment, the other end then is in lower dead point position) and with two the 2nd position 30a2,30b2 that are in lower dead point position (this moment, the other end was in upper dead center position) of piston 16.Here, vertically cut off waveform cam 30 along the line that connects two the 1st position 30a1 on the camming surface 30a.Perhaps, the line of two first position 30b1 on the waveform camming surface 30b vertically cuts off waveform cam 30.Above-mentioned so-called cylinder is that at this moment section configuration (profile) is formed same curved surface, the curved surface that same curve is obtained as lead.So-called lead is to move and its predetermined curve when producing curved surface along predetermined curve straight line.
Here, with the axis consistent of camming surface 30a with axis L0 as the Z axle, the axis that will be in the 1st position 30a1 on the camming surface 30a of upper dead center position by of piston 16 is as Y-axis, and vertical therewith axis is as X-axis, and then above-mentioned cylinder is represented by formula (1).
Z＝f(X) …(1)
The curved surface that forms each camming surface 30a, 30b as shown in Equation (2), the parabola of representing as parameter with X, Z obtains as lead, promptly, this curved surface as shown in Figure 4, will with the parabola of formula (2) as lead and the part on imaginary parabolic cylinder surface (hereinafter referred to as parabolic cylinder) 35 downcut according to circle and obtain.By this curved surface and front and back (in the table) two camming surface 30a, 30b is combined, thereby obtained the waveform cam 30 of present embodiment state.
Z＝-C1·X
2＋C2 …(2)
Here, C1, C2 set the constant that size determined by compressor.
The curved surface that is made of above-mentioned this parabolic cylinder 35 has been used on the waveform cam 30.Thus, as shown in Figure 3, two part 2 30b2 on two the 2nd position 30a2, the camming surface 30b on the camming surface 30a and camming surface 30a on two the 1st position 30a1, camming surface 30b on two the 1st position 30b1 be set on each camming surface 30a, the 30b with the angle intervals of mutual 180 degree respectively.The 30b1 at the 1st position on the 30a1 at the 1st position on the camming surface 30a and the 30a2 at the 2nd position and the camming surface 30b and the 2nd position 30b2 are set on each camming surface 30a, 30b with the interval of mutual an angle of 90 degrees respectively.The 2nd position 30a2 on the one side camming surface 30a and the 30b1 at the 1st position on the opposite side camming surface 30b are in back-to-back position relation.Equally, the 1st position 30a1 on the side camming surface 30a and last the 2nd position 30b2 of opposite side camming surface 30b are in back-to-back position relation.Therefore, camming surface 30a and camming surface 30b spend the state configuration of phase differences on waveform cam 30 with mutual 90.By with the part of parabolic cylinder 35 as camming surface 30a, 30b, constitute by prominent curved surface thereby make it surface is whole.
Here, in order to make each piston 16 to-and-fro motion sleekly, the interval of center Q1, the Q2 of two piston shoes 33,34 relative to each other needs certain.That is, the space requirement of deflection curve F1, the F2 on two camming surface 30a, the 30b makes on the direction on the axis L0 and keeps certain eventually.If meet this requirement then following 2 conditions establishment.
Here, the 1st condition is by being realized on two camming surface 30a, the 30b of waveform cam 30 by the shape set that above-mentioned parabolic cylinder 35 obtains.In order to satisfy the 2nd condition, two camming surface 30a, 30b preferably make the shape with the sine wave characteristics curve representation, in this case, 30 angle of revolution of waveform cam is with " θ " expression, the path increment of piston 16 is by " H " expression, and the displacement of the Z-direction of center Q1, the Q2 of piston shoes 33,34 and the relation of angle of revolution θ are represented by formula (3).
Z(θ)＝(H/2)·cos(2θ) …(3)
Here, only a camming surface 30a among two camming surface 30a, the 30b with same shape is investigated, in addition, piston 16 angle of revolution when being positioned at upper dead center is " 0 degree " among cylinder barrel 13a, the 14a.The Z axle is corresponding to the central axis L 0 of live axle 11.Y-axis is parallel with the axis 35a of parabolic cylinder 35 on being formed at camming surface 30a, and X-axis is parallel with the axis 35a of the parabolic cylinder 35 that is formed at camming surface 30b.
As shown in Figure 5, the projection of formula (3) on the X-Z plane, the X coordinate of Z (θ) are represented by formula (4).
X(θ)＝Rbp·sinθ …(4)
But Rbp represents the radius of circumferential surface C0.Obtain relation between Z coordinate and the X coordinate from formula (3) and formula (4), represent by formula (5).
Z(θ)＝(H/2)·cos(2θ)
＝(H/2)·(1－2·sin
2θ)
∴Z(X)＝(H/2)·(1－2·X
2/Rbp
2)
＝H/2·－H·X
2/Rbp
2 …(5)
Formula (6) below formula (5) expression parabola, formula (2) have derived with formula (5).
C1＝H/Rbp
2
C2＝H/2 …(6)
Like this, the parabola that satisfies formula (6) is adopted by two camming surface 30a, 30b as the part of the parabolic cylinder 35 of lead, uses this waveform cam 30, just can allow piston 16 to-and-fro motion sleekly.
Fig. 2 is the sectional view of the 2-2 line of Fig. 1, a side camming surface 30a who has represented waveform cam 30, at this, because two camming surface 30a, 30b are of similar shape, thereby omitted explanation to opposite side camming surface 30b, waveform cam 30 has the jut 26 of supporting driving shaft 11, forms groove 37 and recess 38 between this jut 26 and the camming surface 30a.The groove 37 adjacent with each the 1st position 30a1 is positioned at jut 26 to be on the same circumference at center, also to expand towards the outside of waveform cam 30 by each groove 37 with the recess 38 that each the 2nd position 30a2 is adjacent that its width is bigger than groove 37.Waveform cam 30 has the inclined-plane 39 that the outside of the camming surface 30a relative with recess 38 forms.This inclined-plane 39 intersects with camming surface 32a.Therefore, the width V1 of the width V2 of the camming surface 30a folded the 2nd position 30a2 camming surface 30a than the 1st position 30a1 near near is narrow between recess 38 and the inclined-plane 39.This width V1 is narrower than the width of plane 33b, the 34b of piston shoes 33,34.
Below, the effect of the cam type compressor of said structure is described.Along with the rotation of live axle 11, waveform cam 30 begins rotation, and the effect by this cam 30 and piston shoes 33,34 makes piston 16 to-and-fro motion in cylinder barrel 13a, 14a.At this moment, one of piston is moved to lower dead centre from upper dead center among cylinder barrel 13a, the 14a, thus, by suction port 22 cooling gas is sucked cylinder barrel 13a from suction chamber 24.Among the 14a.Like this, by piston one from lower dead centre to the moving of upper dead center, the cooling gas that sucks among cylinder barrel 13a, the 14a is compressed, be discharged to by exhaust port 23 and discharge in the chamber 25.
When piston 6 to-and-fro motion, plane 33b, the 34b of piston shoes 33,34 be 30a, the 30b of the camming surface of waveform cam 30 rotation relatively all the time.The deflection curve F2 of the camming surface 30b of waveform cam 30 is owing to satisfy above-mentioned each condition, with respect to the phase shifting " pi/2 " of deflection curve F1, and Z-direction, that is, the interval of two deflection curve F1, F2 of live axle 11 directions is certain all the time.
Manufacture method to waveform cam 30 describes below.At first, the original shape of waveform cam 30 obtains by casting methods such as casting formings.Then, remove the burr on mo(u)lding surface, the certain position at mo(u)lding passes through the cutting perforate simultaneously.At last, obtain having the waveform cam 30 of camming surface 30a, 30b by grinding to the mo(u)lding surface.
As shown in Figure 6, used the NC milling machine that has emery wheel 40 that grinding uses and swing platform 43 etc. in the present embodiment.The emery wheel 40 that forms the flat-top cap shape has grinding face 41 in its end.Also the external diameter than waveform cam 30 is big for these emery wheel 40 its external diameters.The axle 42 of emery wheel 40 rotations is installed on the running shaft (not shown) of NC milling machine.The running shaft of this emery wheel 40 and NC milling machine is interlock rotation and lifting mutually.Swing platform 43 is installed on the table top (not shown) of NC milling machine.In the hole of the jut 26 of the part insertion waveform cam 30 of platform 43.Waveform cam 30 can not be with respect to platform 43 rotations, and platform 43 can be that the center is in the clockwise direction of Fig. 6 and swing counterclockwise along its running shaft 44.This waveform cam 30 with respect to platform 43 with the axis L 5 that is parallel to running shaft 44 with support by the parallel mode of the Y-axis of each the 1st position 30a1 on the camming surface 30a.
When grinding raised wheel face 30a, at first under the situation of emery wheel 40 rotations, make it to descend, its grinding face 41 is contacted with camming surface 30a.At this moment, near the 2nd position 30a2 of camming surface 30a one side, to adjust the inclination angle of platform 43 with grinding face 41 contacted modes.In this state, as shown in Figure 6, by predetermined amount that emery wheel 40 is descended, thereby among the incision camming surface 30a.From this state, along the rotation of the counter clockwise direction of Fig. 6, and emery wheel 40 is slowly risen when moving in the horizontal direction under the certain state of approach platform 43, like this, when the contacting part of camming surface 30a and emery wheel 40 arrives the 1st position 30a1, allow emery wheel 40 slowly descend again.Have again as shown in Figure 7, when the contacting part of camming surface 30a and emery wheel 40 arrives the opposing party's the 2nd position 30a2, emery wheel 40 risen, by with emery wheel 40 from camming surface 30a disengaging, and finished grinding to camming surface 30.Grinding to camming surface 30b is also carried out equally in above-mentioned.
In addition, when grinding raised wheel face 30a, 30b, a series of actions such as rotation of the lifting of emery wheel 40 and platform 43 use the predefined procedure of using according to control NC milling machine of computer to carry out.
In the present embodiment, waveform cam 30 have with one of piston 16 with the groove 37 of the adjacent camming surface 30a of the 1st position 30a1, the 30b1 that are positioned at upper dead center position, 30b inboard and with this groove 37 more to the recess 38 of foreign side's expansion of waveform cam 30.In addition, waveform cam 30 also has the inclined-plane 39 that be formed at camming surface 30a, the 30b outside relative with recess 38, that is, and in this embodiment, with the width V1 of camming surface 30a, the 30b of the 1st position 30a1,30b1 mutually this, the width V2 of camming surface 30a, the 30b of the 2nd position 30a2,30b2 is narrow.
Like this, the part of the wall of that a part of waveform cam 30 that width V2 is narrow is removed, thereby has realized the lightweight of waveform cam 30.In addition, in waveform cam 30, compare narrow with other width V1 with the width V2 that allows of piston 16 be positioned at the 2nd position 30a2 of lower dead centre, camming surface 30a, 30b that 30b2 is connected.Like this, the surface of contact of camming surface 30a, 30b and emery wheel 40 reduces.For this reason, the area of cut of cutting at a waveform cam 30 usefulness emery wheels 40 is reduced, thereby the life-span of this part emery wheel 40 is prolonged.
In this embodiment, for camming surface 30a, 30b, near the width V2 the 2nd position 30a2, the 30b2 is narrow, and is just little to the pressure of the piston shoes 33,34 of this position 30a2, the last effect of 30b2.Promptly, of piston 16 from lower dead centre when upper dead center moves, the cooling gas that sucks among cylinder barrel 13a, the 14a is compressed, like this, when piston 16 is positioned near the upper dead center, because it is maximum that the interior pressure among cylinder barrel 13a, the 14a reaches, the compression counter-force that acts on camming surface 30a, the 30b by piston shoes 33,34 just reaches maximum.Therefore, the width V1 of camming surface 30a, the 30b of the 1st position 30a1,30b1 preferably and the width of plane 33b, the 34b of piston shoes 33,34 about equally.
To this owing to when sucking cooling gas, form negative pressure among cylinder barrel 13a, the 14a, by piston shoes 33,34 act on camming surface 30a, counter-force above the 30b is little of being left in the basket, therefore, above-mentioned width V2 can not cause any fault than width V1 is narrow yet.
In the present embodiment, the grinding face 41 that is positioned at the emery wheel end is exerted pressure with respect to camming surface 30a, 30b approximate vertical and is carried out grinding.Like this, can make the moment that acts on the axle 42 little, thereby can suppress the bending of axle 42, and then can carry out high-precision grinding camming surface 30a, 30b.Consequently, the high waveform cam 30 of dimensional accuracy can be accessed, just Wave cam type compressor can be accessed with high compression efficiency by using this waveform cam 30.
In the present embodiment, for waveform cam 30 is carried out grinding, used to compare and wanted bigger emery wheel 40 with the profile of this cam 30.Like this, for example by shown in the grid line of Fig. 8, can be to being that grinding is carried out with emery wheel 40 simultaneously in symmetrical two positions, center with the X-axis.For this reason, it is the symmetrical shape in center that waveform cam 30 is formed with the X-axis, and forms same size and identical surface roughness.In addition, can also shorten the milling time of waveform cam 30 significantly.
Have, the present invention is not limited to the foregoing description again, in the scope that does not break away from comprehensive purport of the present invention, particularly by following form the present invention is specialized.
In the above-described embodiments, on waveform cam 30, adopt camming surface 30a, the 30b of the part formation of imaginary parabolic cylinder 35.To this, can adopt the camming surface that forms by concave curved surface and convex surface as the waveform cam.In any case,, can make the narrowed width of the camming surface at the 2nd position when allowing piston be positioned at lower dead centre for the camming surface of waveform cam.
In the above-described embodiments, the external diameter of emery wheel is set greatlyyer than the external diameter of waveform cam 30, and the width of the grinding face of emery wheel is bigger than the width of camming surface, and the axle of emery wheel be configured in the perpendicular direction of camming surface wheel on.For this emery wheel, when the cutting cam face, can prevent the bending of axle, thereby can carry out high-precision abrasive machining the camming surface that proposes in the purpose of the present invention.
Adopted in the above-described embodiments with certain parabola make lead and the imaginary parabolic cylinder 35 that obtains as camming surface 30a, 30b, to this, lead also can be that to have the foregoing description be the curve of shape of the symmetry at center like that with the Z axle.
Claims (9)
1, a kind of Wave cam type compressor, its live axle (11) is provided with waveform cam (30), to on axis (L0) direction of live axle (11), be made to right cylinder barrel (13a, 14a) configuration is a plurality of on the circumference that with above-mentioned axis (L0) is the center, to be installed in above-mentioned each to cylinder barrel (13a, the double-head piston that has a pair of head (16) 14a) with along above-mentioned axis (L0) direction movably mode be provided with, be provided with in the bi-side of above-mentioned waveform cam (30) and have identical shaped pair of cams face (30a, 30b), at above-mentioned each camming surface (30a, one that is respectively arranged with 30b) above-mentioned each double-head piston (16) is positioned at above-mentioned cylinder barrel (13a, first position (the 30a1 that upper dead center position 14a) is used, 30b1) and with of above-mentioned each double-head piston (16) be positioned at cylinder barrel (13a, second position (the 30a2 of lower dead point position 14a), 30b2), can be with respect to above-mentioned each camming surface (30a, 30b) move a pair of piston shoes (33 that are provided with, 34) be connected on above-mentioned each double-head piston (16), by with the rotation of above-mentioned live axle (11) the above-mentioned waveform cam of all-in-one-piece (30), via last each to piston shoes (33,34) make of above-mentioned each double-head piston (16) at above-mentioned cylinder barrel (13a, to-and-fro motion between upper dead center 14a) and the lower dead centre, simultaneously, by allowing one of above-mentioned double-head piston (16) moving to above-mentioned lower dead centre from above-mentioned upper dead center, and fluid is sucked above-mentioned cylinder barrel (13a, 14a), and by above-mentioned double-head piston (16) one moves above-mentioned upper dead center from above-mentioned lower dead centre, and will suck above-mentioned cylinder barrel (13a, fluid 14a) compresses, and it is characterized in that:
On the projection plane that on the imaginary plane vertical above-mentioned each camming surface (30a, 30b) is formed during along above-mentioned central axis (L0) projection, the width (V2) of each camming surface (30a, 30b) of above-mentioned the 2nd position (30a2,30b2) is set for the width (V1) of above-mentioned each camming surface (30a, 30b) that is narrower than above-mentioned the 1st position (30a1,30b1) with the central axis (L0) of above-mentioned waveform cam (30).
2, Wave cam type compressor as claimed in claim 1 is characterized in that: above-mentioned each camming surface (30a, 30b) is made of the part of certain imaginary damaged surface.
3, Wave cam type compressor as claimed in claim 1 or 2, it is characterized in that: above-mentioned waveform cam (30) has and is arranged at that a pair of jut (26) of above-mentioned live axle (11) is supported in its bi-side and at each jut (26) and each camming surface (30a, groove (37) that forms 30b) and recess (38), above-mentioned each camming surface (30a, 30b) be formed centrally ring-shaped continuous in above-mentioned jut (26) being, above-mentioned each groove (37) and above-mentioned each the 1st position (30a1,30b1) adjacent, and above-mentioned each recess (38) and above-mentioned each the 2nd position (30a2,30b2) adjacent, above-mentioned each recess (38) than each groove (37) on its width direction more towards the expansion of the outside of waveform cam (30), thereby above-mentioned each the 2nd position (30a2, each camming surface (30a 30b2), width 30b) (V2) is than the 1st position (30a1, each camming surface (30a 30b1), width 30b) (V1) is set must be narrow.
4, as claim 1,2 or 3 described Wave cam type compressors, it is characterized in that: above-mentioned waveform cam (30) has and is arranged at a pair of jut (26) that above-mentioned live axle (11) is supported in its bi-side, above-mentioned each camming surface (30a, 30b) be formed centrally ring-shaped continuous in above-mentioned jut (26) being, by with above-mentioned each the 2nd position (30a2, above-mentioned each camming surface (30a 30b2), certain amount is removed towards the inside of above-mentioned waveform cam (30) in outside 30b), and makes above-mentioned each the 2nd position (30a2, each camming surface (30a 30b2), width 30b) (V2) is set than the 1st position (30a1, each camming surface (30a 30b1), (V1) is narrow for width 30b).
5, as the described Wave cam type compressor of claim 1～4, it is characterized in that: above-mentioned each camming surface (30a, 30b) has a pair of the 1st position (30a1,30b1) and a pair of the 2nd position (30a2,30b2) respectively, a pair of the 1st position (30a1,30b1) is with the angle intervals setting of mutual 180 degree, equally, a pair of the 2nd position (30a2,30b2) is also with the angle intervals settings of mutual 180 degree, and (30a2, the 30b2) at above-mentioned the 1st position (30a1,30b1) and the 2nd position is then with the interval disposed adjacent of mutual an angle of 90 degrees.
6, as the described Wave cam type compressor of claim 1～5, it is characterized in that: it is the formed surface of convex surface that lead obtains that above-mentioned imaginary cylinder has by predetermined parabola.
7, as the described Wave cam type compressor of claim 1～5, it is characterized in that: it is the formed surface of parabolic surface that lead obtains that above-mentioned imaginary cylinder has by predetermined parabola.
8, as the described Wave cam type compressor of claim 1～7, it is characterized in that: above-mentioned each piston shoes (33,34) have and contacted plane of above-mentioned each camming surface (30a, 30b) (33 b, 34b) and the sphere (33a, 34a) that is connected with above-mentioned each double-head piston (16).
9, Wave cam type compressor as claimed in claim 8 is characterized in that: set narrowlyer than the width on the above-mentioned plane (33b, 34b) of above-mentioned each piston shoes (33,34) with the width (V2) of adjacent above-mentioned each camming surface (30a, 30b) in above-mentioned each the 2nd position (30a2,30b2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107382 CN1160821A (en) | 1996-03-29 | 1996-03-29 | Wave cam type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107382 CN1160821A (en) | 1996-03-29 | 1996-03-29 | Wave cam type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1160821A true CN1160821A (en) | 1997-10-01 |
Family
ID=5119580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96107382 Pending CN1160821A (en) | 1996-03-29 | 1996-03-29 | Wave cam type compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1160821A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114787513A (en) * | 2019-12-17 | 2022-07-22 | 米司创有限责任公司 | Axial piston pump with inclined plates |
-
1996
- 1996-03-29 CN CN 96107382 patent/CN1160821A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114787513A (en) * | 2019-12-17 | 2022-07-22 | 米司创有限责任公司 | Axial piston pump with inclined plates |
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